Abstract: We calculate the amplitude of elastic photon-photon scattering via a single quark loop in the double-logarithmic approximation, presuming all external photons to be off-shell and unpolarized. At the same time we account for the running coupling effects. We consider this process in the forward kinematics at arbitrary relations between t and the external photon virtualities. We obtain explicit expressions for the photon-photon scattering amplitudes in all double-logarithmic kinematic regions. Then we calculate the small-x asymptotics of the obtained amplitudes and compare them with the parent amplitudes, thereby fixing the applicability regions of the asymptotics, i.e., fixing the applicability region for the nonvacuum Reggeons. We find that these Reggeons should be used at x<10-8 only. © 2018 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.

Cite: Ermolaev B.I. , Ivanov D.Y. , Troyan S.I.
Elastic scattering of virtual photons via a quark loop in the double-logarithmic approximation
Physical Review D: Particles and fields. 2018. V.97. N7. 074001 . DOI: 10.1103/PhysRevD.97.076007 WOS Scopus OpenAlex

Identifiers:

Web of science:	WOS:000429933100002
Scopus:	2-s2.0-85046745652
OpenAlex:	W2745138206

Citing:

DB	Citing
Scopus	4
OpenAlex	3
Web of science	4

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